/* ===== Base ===== */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

:root {
  --bg:        #f0f2f5;
  --surface:   #ffffff;
  --border:    #d1d5db;
  --primary:   #2563eb;
  --primary-h: #1d4ed8;
  --success:   #16a34a;
  --warning:   #d97706;
  --error:     #dc2626;
  --text:      #111827;
  --muted:     #6b7280;
  --radius:    8px;
  --shadow:    0 1px 3px rgba(0,0,0,.1), 0 1px 2px rgba(0,0,0,.06);
}

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.5;
  min-height: 100vh;
}

/* ===== Header ===== */
.header {
  background: var(--primary);
  color: #fff;
  padding: 14px 24px;
  display: flex;
  align-items: center;
  gap: 10px;
  box-shadow: 0 2px 4px rgba(0,0,0,.15);
}
.header h1 { font-size: 1.2rem; font-weight: 600; letter-spacing: .01em; }
.header-icon { font-size: 1.4rem; }

/* ===== Layout ===== */
.container {
  max-width: 900px;
  margin: 32px auto;
  padding: 0 16px;
  display: flex;
  flex-direction: column;
  gap: 20px;
}

/* ===== Stats row ===== */
.stats-row {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 12px;
}
.stat-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 16px;
  text-align: center;
  box-shadow: var(--shadow);
}
.stat-value {
  font-size: 2rem;
  font-weight: 700;
  color: var(--primary);
  line-height: 1.1;
}
.stat-label {
  font-size: .75rem;
  color: var(--muted);
  text-transform: uppercase;
  letter-spacing: .05em;
  margin-top: 4px;
}

/* ===== Card ===== */
.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 24px;
  box-shadow: var(--shadow);
}
.card-title {
  font-size: .8rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: .06em;
  color: var(--muted);
  margin-bottom: 16px;
}

/* ===== Upload zone ===== */
.drop-zone {
  border: 2px dashed var(--border);
  border-radius: var(--radius);
  padding: 36px 24px;
  text-align: center;
  cursor: pointer;
  transition: border-color .15s, background .15s;
  background: #fafafa;
}
.drop-zone:hover, .drop-zone.drag-over {
  border-color: var(--primary);
  background: #eff6ff;
}
.drop-zone.drag-over { border-style: solid; }
.drop-icon { font-size: 2.5rem; margin-bottom: 8px; }
.drop-text { font-size: .95rem; color: var(--muted); margin-bottom: 12px; }
.drop-text strong { color: var(--text); }

.btn-file {
  display: inline-block;
  padding: 7px 16px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  font-size: .85rem;
  cursor: pointer;
  transition: background .12s;
}
.btn-file:hover { background: #f3f4f6; }

.selected-file {
  margin-top: 10px;
  font-size: .85rem;
  color: var(--success);
  font-weight: 500;
  min-height: 1.2em;
}

/* ===== Options row ===== */
.options-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-top: 16px;
  padding-top: 16px;
  border-top: 1px solid var(--border);
}
.toggle-label {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: .9rem;
  cursor: pointer;
  user-select: none;
}
.toggle-label input[type="checkbox"] {
  width: 16px;
  height: 16px;
  cursor: pointer;
  accent-color: var(--primary);
}

.btn-extract {
  padding: 9px 24px;
  background: var(--primary);
  color: #fff;
  border: none;
  border-radius: var(--radius);
  font-size: .95rem;
  font-weight: 600;
  cursor: pointer;
  transition: background .12s, opacity .12s;
}
.btn-extract:hover:not(:disabled) { background: var(--primary-h); }
.btn-extract:disabled { opacity: .45; cursor: not-allowed; }

/* ===== Status bar ===== */
.status-bar {
  padding: 12px 16px;
  border-radius: var(--radius);
  font-size: .9rem;
  font-weight: 500;
  display: flex;
  align-items: center;
  gap: 8px;
  border: 1px solid transparent;
}
.status-idle    { background: #f9fafb; border-color: var(--border); color: var(--muted); }
.status-loading { background: #eff6ff; border-color: #bfdbfe;       color: var(--primary); }
.status-success { background: #f0fdf4; border-color: #bbf7d0;       color: var(--success); }
.status-error   { background: #fef2f2; border-color: #fecaca;       color: var(--error); }

/* ===== Spinner ===== */
.spinner {
  display: inline-block;
  width: 16px; height: 16px;
  border: 2px solid currentColor;
  border-top-color: transparent;
  border-radius: 50%;
  animation: spin .7s linear infinite;
  flex-shrink: 0;
}
@keyframes spin { to { transform: rotate(360deg); } }

/* ===== Result section ===== */
.result-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 14px;
}
.result-title {
  font-size: 1.05rem;
  font-weight: 600;
}
.confidence-badge {
  font-size: .78rem;
  font-weight: 600;
  padding: 3px 10px;
  border-radius: 999px;
  background: #dcfce7;
  color: var(--success);
}
.confidence-badge.warn { background: #fef9c3; color: #854d0e; }
.confidence-badge.low  { background: #fee2e2; color: var(--error); }

/* ===== JSON viewer ===== */
.json-viewer {
  background: #1e1e1e;
  border-radius: var(--radius);
  padding: 16px;
  overflow-x: auto;
  max-height: 480px;
  overflow-y: auto;
}
.json-viewer pre {
  font-family: "Cascadia Code", "Fira Code", Consolas, monospace;
  font-size: .82rem;
  line-height: 1.6;
  color: #d4d4d4;
  white-space: pre;
}
.json-key     { color: #9cdcfe; }
.json-string  { color: #ce9178; }
.json-number  { color: #b5cea8; }
.json-boolean { color: #569cd6; }
.json-null    { color: #808080; }

/* ===== Warnings ===== */
.warnings-box {
  background: #fffbeb;
  border: 1px solid #fde68a;
  border-radius: var(--radius);
  padding: 14px 16px;
  margin-top: 14px;
}
.warnings-title {
  font-size: .8rem;
  font-weight: 700;
  color: #92400e;
  text-transform: uppercase;
  letter-spacing: .05em;
  margin-bottom: 8px;
}
.warnings-box ul {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 4px;
}
.warnings-box li {
  font-size: .875rem;
  color: #78350f;
}
.warnings-box li::before {
  content: "! ";
  font-weight: 700;
  color: var(--warning);
}

/* ===== Saved paths ===== */
.paths-section { margin-top: 14px; }
.paths-title {
  font-size: .8rem;
  font-weight: 600;
  color: var(--muted);
  text-transform: uppercase;
  letter-spacing: .05em;
  margin-bottom: 8px;
}
.path-row {
  display: flex;
  align-items: baseline;
  gap: 10px;
  padding: 4px 0;
  border-bottom: 1px solid #f3f4f6;
  font-size: .82rem;
}
.path-row:last-child { border-bottom: none; }
.path-label {
  min-width: 110px;
  color: var(--muted);
  font-weight: 500;
  text-transform: capitalize;
  flex-shrink: 0;
}
.path-value {
  font-family: Consolas, monospace;
  color: var(--text);
  word-break: break-all;
}

/* ===== Responsive ===== */
@media (max-width: 600px) {
  .stats-row { grid-template-columns: repeat(2, 1fr); }
  .options-row { flex-direction: column; align-items: flex-start; gap: 12px; }
}